Teresa, you may be able to use Verizon backup from the phone to export them and import them into the iPhone, but I cannot find any info on if it is supported by Verizon any longer

Samsung has a utility for old phones here

Otherwise here are instructions for the same type phone using a PC and software

USB cable for both above software here

If neither works, the last resort is to sit down and re-enter them on the iPhone manually, from there they will sync with iCloud so you don’t have to do this again